3.
a. 1) have been
2) was
b. 1) have seen
2)was
c. 1) hasn`t called
2) did you leave
d. 1) went
2)has left
e. 1) Have you found
2) looked
3)have you tried
4)looked
7.
1 - is not big enough
2- the last time he sat
3- has been a month since
4- have not heard from
5- still have not got
